Searching for non Gaussian signals in the BOOMERanG 2003 CMB maps

Details Searching for non Gaussian signals in the BOOMERanG 2003 CMB maps Searching for non Gaussian signals in the BOOMERanG 2003 CMB maps

2007-05-11

arxiv.org/abs/0705.1615v2

Astrophys.J.670:L36,2007

Astronomy and Astrophysics

Astrophysics

accepted for publication in ApJ. Letters

Scientific paper

10.1016/j.newar.2006.11.064

We analyze the BOOMERanG 2003 (B03) 145 GHz temperature map to constrain the amplitude of a non Gaussian, primordial contribution to CMB fluctuations. We perform a pixel space analysis restricted to a portion of the map chosen in view of high sensitivity, very low foreground contamination and tight control of systematic effects. We set up an estimator based on the three Minkowski functionals which relies on high quality simulated data, including non Gaussian CMB maps. We find good agreement with the Gaussian hypothesis and derive the first limits based on BOOMERanG data for the non linear coupling parameter f_NL as -300

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